Patent US3797412A successfully refreshed from Google Patents.
US3797412A
Expired / Lapsed
US
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Apparatus for destruction of documents
Assignee: United States Department of the Army
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Filing: 1971-09-29
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Granted: 1974-03-19
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Expires: 1991-09-29
Abstract
Abstract Apparatus and a method for fully destroying papers, packaged paper and other documents or combustibles in a safe.
Inventors
- 👤 Paola V Di
- 👤 R Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:53
CPC Classifications
E; E05; E05G; E05G1/00; E05G1/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
116 words
In combination with a safe or storage container, means to introduce oxygen-bearing gas thereto, comprising a conduit leading from an external source of supply to a wall of said safe or container, passage means through said wall and leading to the storage space therein, and passage means adjacent to the bottom of a compartment in said safe or container to conduct and distribute said oxygen-bearing gas beneath the storage space to facilitate the burning of combustibles therein; said apparatus further comprising ingiter means to initiate combustion, and a fusible plug adjacent to said igniter means, said igniter means acting to incapacitate said fusible plug upon ignition and to pass oxygen-bearing gas to said safe or container.
Claim 2
Dependent Claim
116 words
In combination with a safe or storage container, means to introduce oxygen-bearing gas thereto, comprising a conduit leading from an external source of supply to a wall of said safe or container, passage means through said wall and leading to the storage space therein, and passage means adjacent to the bottom of a compartment in said safe or container to conduct and distribute said oxygen-bearing gas beneath the storage space to facilitate the burning of combustibles therein; said apparatus further comprising ingiter means to initiate combustion, and a fusible plug adjacent to said igniter means, said igniter means acting to incapacitate said fusible plug upon ignition and to pass oxygen-bearing gas to said safe or container.
Claim 3
Dependent Claim
36 words
Apparatus as in claim 1 and a grid to support combustibles out of contact with the bottom of a compartment to permit free gaseous oxygen to flow beneath the combustibles to assist in the burning thereof.
Claim 4
Dependent Claim
34 words
Apparatus as in claim 2 wherein said passage means adjacent to the bottom of a compartment comprises a perforated conduit extending from said passage means through said wall into the space beneath said grid.
Claim 5
Dependent Claim
36 words
Apparatus as in claim 3 wherein said perforated conduit is carried by a drawer in said safe or container and is adapted to register with said passage means through said wall when the drawer is closed.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |